NumberResearch Membership · Data 09/22/2026

Recent prefix assignments

354 prefixes assigned in the last 30 days · from the daily NANPA CO code file, 09/22/2026

Full prefixes (NXX) Thousands-blocks (1,000-number pools)

The Code holder is who opened each NPA-NXX prefix — not necessarily who holds the numbers. A prefix is 10,000 numbers, but under pooling its ten 1,000-number blocks are handed out individually, often to different carriers; the code holder may hold only one block, or none. The Thousands-blocks column shows how the ten blocks are really split — click which blocks → to see who holds each 1,000-number block and its last-4-digit range. Assignments are initial assignments; the current serving carrier may differ due to portability.

Most active assignees, last 30 days
8X8, INC. 39
NEW CINGULAR WIRELESS PCS, LLC - IL 28
ONVOY, LLC - CA 27
NEW CINGULAR WIRELESS PCS, LLC - DC 26
ONVOY, LLC - NJ 20
New assignments by month Sep 2026 Aug 2026 Jul 2026 Jun 2026 May 2026 Apr 2026 Mar 2026 Feb 2026 Jan 2026 Dec 2025 Nov 2025 Oct 2025
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Recent NPA-NXX prefix assignments
AssignedNPA-NXXThousands-blocks taken (last-4 opening)Code holderOCNRate centerState
2011-04-12 347-514 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 NWYRCYZN03 NY
2011-04-12 408-703 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E SNJS WEST CA
2011-04-12 443-897 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - DC 4036 BALTIMORE MD
2011-04-12 478-412 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - GA 983E SANDERSVL GA
2011-04-12 571-492 0–9 XXXall 10 · 7 holders which blocks → COMCAST IP PHONE, LLC 318J OCCOQUAN VA
2011-04-12 571-542 0–9 XXXwhole prefix which blocks → COMCAST IP PHONE, LLC 318J DALE CITY VA
2011-04-12 701-562 0XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MCKENZIE ND
2011-04-12 719-377 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - CO 6567 COLORDOSPG CO
2011-04-12 769-390 0–9 XXXall 10 · 5 holders which blocks → CELLULAR SOUTH, INC. 6581 HATTIESBG MS
2011-04-12 785-333 0–9 XXXall 10 · 5 holders which blocks → HOME COMMUNICATIONS, INC. - KS 906E GYPSUM KS
2011-04-12 845-260 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 MAHOPAC NY
2011-04-12 910-788 0–9 XXXall 10 · 7 holders which blocks → ATLANTIC TELECOM MULTIMEDIA CONSOLIDATED, LLC - NC 452G WHITEVILLE NC
2011-04-12 951-221 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - CA 981E MORENO CA
2011-04-11 207-200 0–9 XXXall 10 · 3 holders which blocks → BELL ATLANTIC MOBILE, INC 6386 PORTLAND ME
2011-04-11 806-530 not yet reported which blocks → VEXUS 4913 MEADOW TX
2011-04-11 806-564 not yet reported which blocks → VEXUS 4913 ROPESVILLE TX
2011-04-11 806-636 not yet reported which blocks → VEXUS 4913 BROWNFIELD TX
2011-04-11 806-870 not yet reported which blocks → VEXUS 4913 LAMESA TX
2011-04-08 571-419 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN17 VA
2011-04-08 571-512 0–9 XXXall 10 · 5 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - VA 6827 WSNGTNZN19 VA
2011-04-08 587-271 not yet reported which blocks → Shaw Telecom Inc. 497E Raymond —
2011-04-08 605-839 6XXX which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 BRANDON SD
2011-04-08 867-974 not yet reported which blocks → Northwestel 8092 Iqaluit —
2011-04-08 908-200 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NJ 6391 CLINTON NJ
2011-04-08 971-258 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC 6010 PORTLAND OR
2011-04-07 210-784 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 SANANTONIO TX
2011-04-07 423-492 0–9 XXXall 10 · 5 holders which blocks → BELLSOUTH TELECOMM INC DBA SOUTH CENTRAL BELL TEL 9419 MORRISTOWN TN
2011-04-07 518-390 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ALBANY NY
2011-04-07 585-353 0–9 XXXwhole prefix which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - NY 6959 ROCHESTER NY
2011-04-07 914-308 0–9 XXXall 10 · 4 holders which blocks → CABLEVISION LIGHTPATH, INC. - NY 7126 WSCHSTZN01 NY
2011-04-06 401-280 0–9 XXXall 10 · 4 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - RI 6389 PROVIDENCE RI
2011-04-06 412-944 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 PTTSBGZON1 PA
2011-04-06 443-930 0–9 XXXall 10 · 3 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - MD 6395 BALTIMORE MD
2011-04-06 580-693 0XXX2XXX3XXX · 2 holders which blocks → CELLCO PARTNERSHIP DBA VERIZON WIRELESS - OK 5813 COMANCHE OK
2011-04-06 616-512 0–9 XXXall 10 · 7 holders which blocks → PAETEC ITEL, LLC 829J DUTTON MI
2011-04-06 647-694 not yet reported which blocks → Iristel Inc. 154E Toronto —
2011-04-06 647-695 not yet reported which blocks → Iristel Inc. 154E Toronto —
2011-04-06 647-696 not yet reported which blocks → Iristel Inc. 154E Toronto —
2011-04-06 647-697 not yet reported which blocks → Iristel Inc. 154E Toronto —
2011-04-06 647-699 not yet reported which blocks → Iristel Inc. 154E Toronto —
2011-04-06 647-797 not yet reported which blocks → Iristel Inc. 154E Toronto —
2011-04-06 832-271 0–9 XXXall 10 · 2 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 HOUSTON TX
2011-04-06 857-600 0–9 XXXall 10 · 5 holders which blocks → BANDWIDTH.COM CLEC, LLC - MA 990E CAMBRIDGE MA
2011-04-05 575-686 1XXX2XXX3XXX4XXX6XXX7XXX8XXX9XXX · 6 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 CAPITAN NM
2011-04-05 614-984 0–9 XXXall 10 · 3 holders which blocks → AERIAL COMMUNICATIONS, INC. 6701 COLUMBUS OH
2011-04-05 702-350 0–9 XXXall 10 · 3 holders which blocks → T-MOBILE USA, INC. 6529 LAS VEGAS NV
2011-04-05 903-471 0–9 XXXall 10 · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 MARSHALL TX
2011-04-04 203-970 0–9 XXXall 10 · 3 holders which blocks → CABLEVISION LIGHTPATH, INC. - CT 4950 NORWALK CT
2011-04-04 317-678 0–9 XXXall 10 · 6 holders which blocks → BANDWIDTH.COM CLEC, LLC - IN 105F NOBLESVL IN
2011-04-04 575-414 0XXX1XXX2XXX3XXX4XXX5XXX7XXX8XXX · 4 holders which blocks → NEW CINGULAR WIRELESS PCS, LLC - IL 6534 LOVING NM

Source: NANPA CO Code Assignments (Utilized, All States, Public), file date 09/22/2026 — Tier A primary source, refreshed on every import. Viewing is free; bulk downloads require a membership.